Valve-grinding apparatus



G. BORING.l

VALVE GRINDING APPARATUS. APPLICATION FILED APR. Io, I92o.

Patented Dec. 14, 192(} 2 SHEETS-SHEET I.

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VALVE GRINDING APPARATUS.

APPLICATION FILED APR. Io. |920.

1,362,469. Patented Dec. 14, 1920.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

GCREENBERRZF BORING, 0F JOHNSON CITY, TENNESSEE.

VALVE-GRNDING APPARATUS.

To all 'whom it may concern:

Be it known that I, GREENBERRY BORING, a citizen of the United States, residing at Johnson City, in the county of lashington and State of Tennessee, have invented certain new and useful Improvements in Valve- Grinding Apparatus; and l do hereby declare the following to be a full, clear,v and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to valve grinding mechanisms, especially adapted for use in simultaneously grinding the several valves of an internal combustionV engine.

An object of the invention is to produce a mechanically operated grinding apparatus which can be easily installed in garages, repair shops, factories and the like, for effectively grinding all of the valves of an automobile engine at one and the same time, without dismantling the engine to any material extent. f

Another object of the invention is theproduction of a valve grinder having a plurality of grinding units or stations, any one of which can be independently cut out without interferring with the continued grinding operations of the others.

A further object of the invention is to produce a valve grinding mechanism in which the grinding units are successively oscillated and periodically advanced so as to insure a uniform grinding of the valve upon its seat.

Vith these and other objects in view, the invention further consists in the provision of a comparatively light, durable and inexpensive arrangement of the several parts hereinafter described and pointed out in the appended claims. v

In the accompanying drawings illustrating an embodiment of my invention, and in which corresponding reference characters designate similar parts in the several views:

Figure l is a plan view of the grinding mechanism;

Fig. 2 is a vertical, transverse, sectional elevation showing one of the grinding units in an inoperative or disengaged position;

Fig. 3 is an enlarged fragmentary plan of one of the grinding units;

Fig. 4; is an enlarged vertical sectional view through one of the grinding units in an operative grinding position;

Specification of Letters Patent. Patented Dec 14, 1920.

Application led April 10, 1920.

Serial No. 372,793.

Fig. 5 is a detail horizontal sectional view on the line 5-5 of Fig. 4; and

Fig. 6 is a detail vertical sectional view through the releasing mechanism for effecting the advance or successive change in the .oscillations for uniformly grinding the valve.

The present invention, generally stated, includes among other things, a frame having mounted therein a series of grinding units preferably arranged in groups of two to correspond with the relative location of the valves in the head of each cylinder of a multi-cylinder explosive type of engine, means for positively imparting grinding movement to each unit, means yfor successively changing the path of travel or oscilla.- tion of each grinding unit, and means for independently releasing or disconnecting any one or more of the grinding units durinO' the operation of the device.

eferring to the drawings, the main frame 1 is of rectangular contour, and is designed to support the several grinding units or stations 2. The grinding units 2 are further supported in a supplemental frame 3 formed by upper and lower bar 1 and 5 suitably connected with the main frame 1.

Each grinding unit is operatively connected to a driving means consisting of a cam shaft (i, mounted in bearings 7, secured to the frame 1, and a pulley or other device 8 secured to one end of the shaft for receiving power from any convenient source, notV shown.

A series of cams 9, angularly disposed with relation to each other upon the shaft 6, are shown, said cams being designed to actuate rods 10 interconnected with their respective grinding units. rlhe latter being of the same general construction, a description of but one will suffice.

Referring particularly to Figs. 3 to 6, the unit 2 includes a grinding element 11 con sisting of a shaft l12 having on its lower end a suitable valve or grinder engaging head 13, and upon its upper end a toothed wheel 14. The extreme upper end 15 of the shaft 12 is journaled or telescoped into the lower end 16 of an interconnected shaft 17, which latter has its upper end journaled in the upper` cross bar 4E of the supplemental frame.

Secured to and extending from the shaft 17 is an arm 18, the end of which is connected at 19 to a movable yoke 2O which in turn is interconnected with the actuating rod 10 hereinbefore referred to.

4The yoke 20 is provided with an open collar 21 at the end opposite to the pivotal connection 19, so as to permit of its being raised out of operative connection, as shown in Fig. 2. Spring actuated fingers or catches end of the frame 27 and a collar 29 secured to the rod 11. The rod 11 is preferably provided with an enlarged head 30 designed to bear against and receive motionfrom the cam 9, the spring 28 serving to hold the head 30 against the cam as will be understood.

Extending from the yoke 20 is a finger or pawl 31 provided with a hooked end 32 ary ranged to engage the teeth of a ratchet 33, keyed upon a shaft 34 which in turn is journaled in bearings 35 extending from the main frame 1.

Upon each reciprocation of the rod 11 and interconnected yoke 20, the finger or pawl 31 successively engages the teeth of the ratchet 33 thereby'rotating .the'shaft 34.

Secured to the shaft 34 is a cam 36 having oppositely disposed high portions 37 arranged to engage the end of an arm 38 for operating the valve changing or advancing mechanism now to be described.

The head 16 of the upper shaft 17 of the grinding unit is designed to support oppositely disposed pawls 39 provided with springs 40 for normally keeping thel said pawls in engagement with the toothed wheel 14 heretofore referred to Vand a collar 41 is mounted upon the lower element or shaft 12 of the grinding unit, and has protruding therefrom an arm 42, the end of which is connected at 43 to the arm 38, which latter, as shown, is supported in a guide frame 44, and is provided with a spring 45 for keeping the end of said arm into operative engagement with the cam 36.

Oppositely disposed lugs 47 are provided on the collar 41, as best shown in Figs. 4 and 6, and are designed to disengage the pawls 39 in amanner to be presently described in connection with the operation of the device.

The means for disengaging the grinding units comprises a lever 48 pivoted at 49 to the frame 1. O ne end of the lever 48V is bifurcated as shown, at 50, and is arranged to straddle and engage a collar 51 secured 17 serves to return the grinding unit to itsY operative position.

In operation, the several grinding units are arranged to'receive simultaneous motion from the cams 9 provided on the shaft V6, and as the actuating rods 10 are actuated. the interconnected yokes 20 reciprocate thereby imparting oscillatory movement throughout the arm 18 to the upper shaft 17 which is normally arranged to positively engage and operate the shaft'12 carrying the grinding element engaging head 13.

Upon each reciprocation of the yoke 20 the pawl 31 operates to revolve the ratchet 33 which in turn rotates the shaft 34 upon which Vis secured the cam 36. As the cam 36 moves through each one half revolution it will be seen that the arm 38 is caused to gradually move thereby bringing one of the lugs 47 under a pawl 39 causing the same to disengage from the toothed wheel 14. y1`he disengagement of this pawl permits the shaft 17 to continue its oscillations through its yoke connections, but in such a manner as to leave the shaft 12 stationary during the return movement until the arm 38 has ridden o Vof the high point 37 of the cam 36. `When the arm 38 moves to the lower portion of the cam, the lug 47 is released from the pawl 39 and the two shafts 17 and 12 respectively, are operatively connected so as to move in unison. During this change or advance of the grinding element, the other pawl 39 rides over the toothed wheel 14 as will be understood.

While I have shown this means of chang ing and advancing the grinding element, other means may be employed and I do not limitmyself to the axact form shown herein.

In disconnecting any one of the units, upon completing the grinding operation, the lever 48 is depressed, thereby lifting the unit together with the yoke 20 from the tapered head 23. When thus disengaged, the actu-- ating rod 10 and the short link 24 are free to reciprocate without imparting movement to theY grinding unit. Vfhen the lever 48 is released the grinding unit and more particularly the open collar 21 of the yoke, drops over the tapered head 23 and the reciprocation of the rod 10V soon causes the spring catches 22 to slip over and engage the head 23 as shown in Fig. 3.

Theadvantages incident to the use ofV my invention are especially pronounced in garages and repair shops where a single operative can manipulate one or more of these devices and at the same time attend to other duties. When one or more of the valves have been sufficiently ground, the grinding unit therefor can be readily disconnected by the operator and the others allowed to continue to grind until all of the valves are properly ground.

Various changes in the proportion and arrangement of the several parts may be made without departing from the spirit of my invention and l do not limit myself to the exact construction herein set forth.

l claim:

l. A cylinder valve grinding device comprising a plurality of valve grinding elements, a shaft connected to each of said ele` ments, means for intermittently disengaging said shafts from the valve grinding elements during the grinding operation, and means for completely disconnecting one or more grinding elements without affecting the aforesaid intermittent operation of the remaining elements.

2. A cylinder valve grinding device comprising a plurality of valve grinding elements7 means including interconnected shafts for oscillating said grinding elements and means for disengaging one of said shafts for intermittently operating the grinding elements to change the path of travel of the aforesaid oscillations.

8. A cylinder valve grinding device comprising a plurality of grinding elements, means for oscillating said grinding elements and means for disengaging said grinding elements from the aforesaid oscillating means for changing the path of travel thereof.

4. n cylinder valve grinding device comprising a plurality of grinding elements,

means for oscillating said grinding elements, means for disengaging said grinding elements from the aforesaid oscillating means for changing the path of travel thereof, and means for completely disconnecting said grinding elements independently of each other from the aforesaid oscillating means.

5. A cylinder valve grinding device comprising a valve grinding element, a shaft connected to said element, means for intermittently disengaging said shaft from the valve grinding element and mea-ns for imparting motion to said shaft.

6. A cylinder valve grinding device comprising a valve grinding elementi a shaft connected to said element, means including a ratchet mechanism for intermittently disengaging said shaft from the valve grinding element, and means for imparting motion to said shaft.

7 A power driven cylinder valve grinding device comprising an oscillating valve grinding element, and means for automati cally changing the path of travel of said grinding element.

8. A multi-cylinder valve grinding device comprising a series of grinding elements, means for simultaneously operating said elements, said means including a cam actuated rod, means for independently disconnecting said elements, said means including a detachable yoke interposed between the aforesaid grinding elements and cam actuating rod, and a lever for effecting the aforesaid disengagement.

ln testimony whereof l aflix my signature in presence of two subscribing witnesses. GREENBERRY BORING. Witnesses:

H. SMITH, Jr,. W. D. BORING. 

